M. Giffard et al., CONVERSION OF THIOCYANATES INTO DISULFIDES - AN APPROACH TO POLY(VINYLENE DISULFIDE) AND RELATED DERIVATIVES FROM (E)-1,2-DITHIOCYANATOALKENES, Journal of chemical research. Synopses, (3), 1993, pp. 126-127
(E)-1,2-Dithiocyanatoalkenes R-C(SCN)=CH-SCN (R = H, Bu(n), Ph) can be
converted into ethylenic polydisulfides of the type -[S-CR=CH-S]n- by
the action of potassium hydroxide and potassium hexacyanoferrate(III)
in aqueous medium; these polymers become semiconducting upon chemical
doping.